Lenovo ThinkCentre M57 Tower, 2.33 GHz, Intel® Core™2 Duo, 1 GB, 80 GB, DVD-ROM, Windows Vista Business Lenovo ThinkCentre M57 Tower. Processor frequency: 2.33 GHz, Processor family: Intel® Core™2 Duo, Processor model: E6550. Internal memory: 1 GB, Internal memory type: DDR2-SDRAM. Total storage capacity: 80 GB, Optical drive type: DVD-ROM. Discrete graphics card model: Intel® GMA 3100. Operating system installed: Windows Vista Business, Operating system architecture: 32-bit. Power supply: 280 W. Chassis type: Tower. Product type: PC. Product colour: Black